A book on Sufism containing a collection of several Sufi epistles by Sheikh Abdul Razzaq al-Qashani. These epistles number around twenty-one, including: "A Gift to the Brethren on the Characteristics of the Brethren," "A Treatise on Divine Decree and Predestination," "An Explanation of the Measure of the Eternal Year and the Designation of Divine Days," "The Epistle of Enmity," etc.